Guess what ... I bought a NAVTECH cabinet ( 2688 B) ... its got a 450 W psu, a blue LED temperature indicator, two side panel fans which go into action whenever the cabinet temperature goes above 38C (u can change this setting) and provision for adding a 90 mm fan at the back ... all these for 2k 8)
On the flip side, the psu is too light to be of 450 W but it must at least be 400W
for any of u who is interested , heres the link
http://www.navtech.org/home.htm
Anyway thanks to all u wonderful ppl who gave their suggestions